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Diameter, mm (1mm - 0,039inch)

Spinel mineral - You can buy these samples

Spinel is a mineral of very diverse colors. The most common colors are red and pink. In ancient times, red spinels, rubies and pyropes did not differ from each other, calling them in one word - "carbuncle". The best samples of spinel are classified as precious stones.

You can see spinel stone for sale and buy it in the Minerals of Russia online store.

Physical properties of Spinel

General
Category
  • Oxide minerals
  • Spinel group
  • Spinel structural group
Formula
(repeating unit)
MgAl2O4
Strunz classification 4.BB.05
Crystal system Cubic
Crystal class Hextetrahedral (43m)
H–M symbol: (43m)
Space group F 4 3 m (No. 216)
Unit cell a = 8.0898(9) Å; Z = 8
Identification
Color Various; red, pink, blue, lavender/violet, dark green, brown, black, colourless
Crystal habit Octehedra or flat triangular plates caused by twinning
Twinning common
Cleavage None
Fracture Conchoidal
Mohs scale hardness 7.5–8.0
Luster Vitreous
Streak White
Diaphaneity Transparent to opaque
Specific gravity (Depending on the composition) The rare Zn-rich spinel can be as high as 4.40, otherwise it averages from 3.58 to 3.61.
Optical properties Isotropic
Refractive index 1.719
Pleochroism Absent
Solubility None
Other characteristics Weak to medium magnetic, sometimes fluorescent (red synthetic yes, natural red sometimes)
Code: 4712
Gon deposit, Aldan, Yakutia, RF
38*36*27mm

0.00 $ $32.00

Code: 3350
Gon deposit, Aldan, Yakutia, RF
50*37*24mm

0.00 $ $19.33

Code: 1233
Gon deposit, Aldan, Yakutia, RF
105*74*53mm

0.00 $ $120.00

Code: 1688
Slyudyanka, Baikal region, RF
38*33*20mm

0.00 $ $30.00

Code: 1221
Gon deposit, Aldan, Yakutia, RF
57*52*33mm

0.00 $ $36.00

Code: 1232
Gon deposit, Aldan, Yakutia, RF
94*80*46mm

0.00 $ $170.00

Code: 4713
Gon deposit, Aldan, Yakutia, RF
47*41*31mm

0.00 $ $48.33

Code: 4655
Gon deposit, Aldan, Yakutia, RF
45*36*27mm

0.00 $ $39.67

Code: 3050
Gon deposit, Aldan, Yakutia, RF
59*44*39mm

0.00 $ $65.00

Code: 3051
Gon deposit, Aldan, Yakutia, RF
35*21*23mm

0.00 $ $45.00

Code: 2675
Slyudyanka, Baikal region, RF
50*37*25mm

0.00 $ $32.67

Code: 2402
Gon deposit, Aldan, Yakutia, RF
23*15*11mm

0.00 $ $22.33

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